I'll give you a run down,
Edexcel A linear maths - revision guide by Edexcel (blue)
York notes for AQA is good for a brief view of the book/novel you will be doing in English lit. I had TKAM and An Inspector Calls. My teacher said you could probably do the exam with the York notes without even reading the book.
English lit AQA also required an anthology book and unseen poetry revision but you might be doing a different route.
AQA history B I had the two books, "twentieth century depth studies" and "international relations..." My teachers said the cgp books are quite bad for history, so use text books instead.
English lan AQA was the blue book like maths. "English and English language revision guide". It says Pearson at the bottom if that's helpful. I strongly recommend this book
AQA A science books. Triple science has the separate books for bio chem and physics. I had just double science so it was "core science" and "additional science" fron cgp
For science, I also had the Nelson Thomas Revision guides. These had great practise questions and good for A grade stuff I think.
Geography ocr b I had the cgp book. I'm not sure about other boards but mine required loads of case studies memorised. A revision guide for geography is essential I think.
French was the AQA French cgp book. It was massive and included an audio cd. I thought the audio was the best, as it helped with the listening exam. It was also from the very basic French so could be used from year 9 (really year 7 in my opinion!). As far as I'm aware it's the same for Spanish, German etc, most modern languages.
I took compulsory Religious studies from Edexcel but in my opinion that does not need a revision guide, just memorise religious quotes.
I also did Latin, the Cambridge Latin course. This was an external option at my school, and simply bought the Cambridge Latin course book 1 for this for the first year.
Additional maths (FMSQ) from OCR, I used the additional maths for OCR book which goes through the course and then the CGP book for it (much better).
So that was everything. I think focus on subjects which require long term memory like the foreign languages and maths. Also if you get the option of early entry, take it! I didn't get any chances and was stuck with 22 exams in just 1 month! Don't worry too much. Focus on any exams to be taken in year 9 or 10 and ease yourself into a timetable of revision. Keep it in the long term memory as it's better than cramming in as so many of us did! Also remember that revision guides really have to cater for all grades so some stuff will just be C grade. The best technique is past papers but don't worry about that yet